Rod mill



F. J. BEHNEMAN AND H. s. RE-xwomHY.A

Roo MILL. APPLICATIN HLED Nov-711921' satema May 2,11922.

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BHNEMAN AND H. S. REXWORTHY.

' Ron MILL.

` APPLLcMLoN FILED Nov. 1. 1921. 1 ,1414,768. Patented May 2,1922.

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y Liar/w T@ F. J. BEHNEMN AN'D H. S. HEXWORTHY.

, Roo MILL.

. APPLICA-Hou FILED Nov.1, 1921. 1,414,768, l f Patented May '2, 1922.

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county of San Francisco and State of California, and said Rnxwonfriir, of Sunnyvale, county of Santa Clara, State of California, have invented certain new and useful im- "provementsin Rod Mills, of which the following is a specification.

The present invention relates to an irnprovement in a classifying apparatus, particularly that type illustrated in 'Letters Patent No. 1,142,159, dated June 8, 1915.

The present invention has for its principal objects to provide a mill or crushing apparatus having a central feed whereby the end discharge in either direction is provided with the material acted on travelling in the same distance from the central feed to the discharge at either end. Afurther object is to provide a classifying rod mill with a crushing anvil in a position to receive the material to be crushed as delivered into the mill; to provide a receiving` zone between opposite sides of the anvil to the material discharge, whereby the partly crushed material is distributed over the entire circumference of the mill for recrushing; and to provide a construction which with slight change is adapted for use as a wet or dry mill.

The invention consists broadly in a rotatably mounted tubular shaft affording a material feed from opposite ends toward its center and which shaft mounts or provides an axis of rotation for a cylinder or shell divided into a plurality of radial communicating compartments, within each of which is contained a group of independent crushing rods held within 'the cylinder by end walls formed with outlet openings for the escape of the crushed material after the same passes from a crushing anvil or from between the rods through a receiving Zone adjacent tothe discharge openings.

With the above mentioned and other objects in view, the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings and pointed outl in the claims hereto appended; it being understood that various changes in the formproportion, size and minor details of construc- Specification of Letters Patent. i Patned Maly 2 1922. Appimimn flied November 7, 192i. l

Serial No. 513,470.

tion within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantagesof the invention.

To more .fully comprehend the invention. reference is directed to the accompanying drawings, wherein- I l .Fig. is avbrolen longitudinal sectional view of the preferred form of our apparatus.

Fig 2 is avertical transverse sectional view taken on line 2-2of Fig. 1.

Fig. 3 is a vertical sectional view through the receiving zone at Vone end of the shell, taken on Vline 3-3 of Fig. 1.

VFig. 4i is a modified form of the receiving Zone employed when the apparatus is used asa dry mill.

i ln the drawings of the apparatus, wherein thesame is .illustrated as a wet mill, and wherein .like characters of reference designate corresponding `partsy in the several views, the numerals 1 indicate parallel spa-ced. supporting posts or standards, each mounting a bearing 2 of any suitable or conventional form, within which are journaled the opposite ends 3 of a tubular mill supporting shaft 4, formed at its opposite ends with the material feed openings 5, and in its center with the spaced openings 8. 0n each end of the shaft is mounted to rotate therewith a well known form of feed head 9 having an inlet opening 10 adapted on each revolut1on of the shaft to dip into a material containing trough 11 and remove therefrom quantity of material. In the drawings, but one of the heads 9 is illustrated.

rlhe interior of the shaft 4f is formed with a feedvworm 12 at each end for conveying the ore or material to be crushed from opposite f ends of the tubular shaft inwardly toward the central discharge openings 8. rIhe shaft 4 at a `point adjacent the openings 8 is formed with an annular hub 13 longitudi-` nally grooved on its periphery between said openings 8, as at 14:, to receive the innerv ends 15 of the radially disposed plates 16, of a width corresponding to that of the hub 13. The plates 16 at their outer ends are received in grooves oi' channels 17 formed on the inner face of an annular anvil ring 18 formed with outwardly divergingor bevelled side walls 19, a main rib 20 and' transverse webs 21 at either side of said main rib and connecting the same `with said walls 19. The inner face or surface ofthe anvil ring i8 is lined with an anvil surface or :tace 22, bolted thereto as at 23, with the ends of each section of said surface receivable in grooves or channels 24 at opposite sides of the outer ends oit said members 16.

lt will be apparent that this construction provides a plurality of quadrant shaped chambers 29 surrounding the shaft t, each communicating with the interior of the shaft 4 through one of said openings 8.

l he main rib of the anvil ring 18 carries a rack 25 intermeshing with a driving pinion 26 adapted for imparting rotation to the ring 18 and shaft 4.

@n each side of the hub 13 the shaft l is mounted a suitable shell supporting ring 27 formed with apertures 28 registering With the quadrant shaped chambers 29', heretotore described.

Mounted to rotate with. the shaitt 4land positioned one at the outer side ot each ring 2i", are the cylinder end plates 29, with each ot which is connected through a securing ring 30 bolted thereto, as at 3l, the

f -outer end or edge or a shell or plate 32, each suitably secured as at 33 to one of the bevelied side walls 19 of the anvil ring 18. The shells 32 are conical in iorm with their smallest diameter connected with the rings 30, providing an annular pocket or receiving zone 34 intermediate the opposite sides oi' the anvil ring and the respective cylinder end members 29.

The construction'described provides a plurality ot radial quadrant shaped rhambers 29 about the shaft 4, near its center, and which chambers all communicate at either side of said anvil ring between its opposite edges and the end plates 29, particularly within the sphere of the receiving- Zones 3d.

rlhe rings 27 on their periphery are provided with ears 35 disposed radially there- Jrom and each secured to a ballie plate 36 in contact at one edge with the bevelled side well i9 oi? the anvil ring 18 and with the inner surface of the shell 32, and terminating near tho inner if'ace oi? the end plate Each. end plate is provided, as in F ig. 2, with a rod hole, closed by a'plate 37, and a manhole closed by a plate 38, and also with annular series oit gratings 39, adjacent its periphery.` affording outlet openings 'for the discharge of the crushed material from. the cylinder, each of said openings being covered by a suitable screen 40. Each end plate is also provided with an outwardly curved or flaring discharge lip al disposed circum- 'terentially of the gratings 39 and screens 40.

Nithin each quadrant shaped compartment or chamber 29 is positioned a group of independent crushing rods d2, preferably cylindrical in end elevation and ot a length to loosely abut against the inner faces of the end walls 29, said group of crushing rods on the rotation of the cylinder rolling on each images other and on therelatively wide crushing e termed with the faces of the inem- G and 22 and a portion of the hub 13.

4lt will be observed that the material fed inwardly from opposite ends ot the shaft d discharges through openings 8 into the quadrant shaped or segmental chambers 29 surrounding the hub 13 and onto the crushing rods 4t2 at a point immediately above and Vwithin the sphere of the anvil surface 22, aifording maximum crushing area within each compartment tor the material immediately on its delivery thereinto. rlhe rotation olf ti e cylinder enables the group or' crushing rods 4:2 to act on the material as the same passes from the anvil toward the discharge gratings 39, as on each revolution the material contained within the receiving Zone 34 is picked up or raised by the plates 36 and dropped downwardly into said groups or crushing rods 4t2, which in their action further crush the material and which crushedl material drops therefrom or from therebetween into the receiving zone 34, the larger particles settling to the bottom and the lighter particles or linely crushed material draining therefrom and passing through the grating 39 and screens 40.

By reference to Fig. 4; it will be observed when the apparatus is used as a dry mill, the cylindncal shell 32 is outwardly flared from its inner to its outer edges in the form of a a shell d2, just the reverse of the form illustrated .in liig. l, this construction permitting the ready passage ot the dried crushed material from opposite sides orP the anvil into anu through the discharge openings formed by gratings 39 and screens 40. lf desired, suitable guards Li3 may be positioned over the opposite ends 29 to arrest the material which may be thrown by centrifugal action from the discharge lips 4l llnder certain conditions it has been found desirable, particularly when the material to be treated contains considerable dust or tine particles, to provide in the surface of the tubular shaft et, at the inner end oi the feed worm l2, one or more annular series of slots or dust passages through which the very tine material which needs but little pulverization may pass directly onto the crushing rods above the receiving chamber 3d.

llaving thus described our invention, what we claim as new and desire to protect by l'ietters Patent is:

l. in axially rotating crushing apparatus comprising feed meansV ladapted to supply material to the center of said apparatus, a plurality of groups ot crushing members arranged annulaily about the same and fixedV with respect one to the other, means tor rotating said groups in unison about the laXis of rotation of the apparatus, a shell enclosing said groups, means 'for introducing material to be crushed to said groups midway llG of their length, and a ,series lof outlets for the crushed material at the opposite ends of said shell.

2. A crushing apparatus comprising feed means adapted to supply material to the center of said apparatus, a plurality of groups of crushing members arranged annularly about the same and fixed with respect one to the other, means for rotating said groups in unison about the axis of rotation of the apparatus, an shell enclosing said groups, means for introducing material to be crushed to said groups midway of their length, a series of outlets for the crushed material at the opposite ends of said shell, and an annular series of receiving chambers within said shell adjacent to its opposite ends.

3. A crushing apparatus comprising feed means adapted to supply material to the center of said apparatus, a plurality of groups of crushing members arranged annularly about the same and fixed with respect one to the other, means for rotating said groups in unison about the axis of. rotation of the apparatus, a shell enclosing said groups, means for introducing material to be crushed to said groups midway of their length, a series of outlets for the crushed material at the opposite ends of said shell, a crushing anvil associated with each group of crushing members and disposed annularly of the axis of rotation of the apparatus and approximately midway of its length, and an annular series of receiving chambers between the opposite ends of said anvil and the ends of said shell.

a. An axially rotating crushing apparatus comprising feed means adapted ,to supply material to the center of said apparatus, a cylinder surrounding the same, end plates for closing the cylinder ends, a crushing anvil extending annularly within the cylinder, crushing rods within the cylinder and loosely abutting against said end plates, said end plates each provided with a discharge opening for the crusned material, means for discharging material centrally into said cylinder midway of its length onto said rods at a point contiguous to said anvil, and means for rotating the shaft and cylinder.

5. A crushing apparatus comprising feeding means adapted to supply material to the center of said apparatus, a rotatable cylinder surrounding the same, end plates at the opposite ends of the cylinder, a crushing anvil extending annularly within the cylinder approximately midway of its length, crushing rods within the cylinder and loosely abutting against said end plates, said end plates each provided with a discharge opening for the crushed material, means for feet ing material into said cylinder longitudinally of said shaft, and an annular series of receiving pockets at opposite ends of the interior of the cylinder adjacent its opposite ends.

6. Acrushing apparatus comprisinga plurality of groups of crushing rods arranged annularly about a common axis and fixed with respect one to another, a cylinder enclosing said groups, the rods of said groups being free to move with respect one to another, but constantly assembled en masse, means for rotating said groups in unison about said common axis, means for feeding material to be crushed to the center of said apparatus and for discharging the saine onto said groups midway of their operative length and an annular series of material receiving pockets adjacent the ends of lsaid groups of crushing rods and opening to the interior of said cylinder. 7. A crushing apparatus comprising a crushing anvil rotatable on a horizontal axis and provided with apertures, a plurality of groups of crushing rods arranged annularly about said axis of rotation, one group within each aperture whereby said groups are vfixed with respect one to another, the rods of said groups being free within their respective apertures to move with respect one to another to constantly assemble en masse, a cylinder enclosing said groups and rotatable therewith, means for feeding material to be crushed to said rods at approximately their longitudinal center and at their point of co-operation with said anvil, and an annular series of products within the opposite ends of the said cylinder adjacent to the ends of said groups of rods. 8. A crushing apparatus comprising a tubular rotatably mounted shaft, an annular crushing anvil rigidly secured thereto and formed with apertures disposed annularly thereof, said shaft provided at one endwith a material inlet opening and at a point in register with said anvil with a plurality of material outlet openings communicating with said annular apertures, a plurality of elongated crushing bars within said anvil apertures, and supported midway of their length by said anvil, a shell surrounding said anvil, end plates closing the opposite ends thereof, and against which said crushing bars loosely abut, each of said end plates provided with material discharge openings, means for rotating said shell, and means for feeding material longitudinally of said shaft. l

9. A crushing` apparatus including a tubular rotating shaft, a crushing anvil carried thereby and provided with apertures disposed annularly of the shaft, said shaft provided with an end feed opening and within its length with a plural series of material discharge openings increasing in size toward the transverse center of said shaft communicating with said apertures, a plurality of elongated crushing bars within each of e ,i feed openings, anal with which said -o snppoitefl inieli-.vay of teen' groups feds Coopeate, and means foi Y said anvil, a shell sni'ro said shell and shaft. sai-il anvil:i end plates Closing the o u p L Crushing appena-tus Compiising a 30 5 ends of said shell anfl Whi h sale philalityof groups of ciushing fools `aioi'nshing l loosely7 ahnt, each of rangeail annulaily about a common axis and plates foniecl with a o'' annulaily fixed with espeot one to another7 the rods posecl outlets, anal ,means for fotating emi of said groups being free to move with reshell speel; one to another, but constantly assein- 35 l@ crushing' eonipzlsino a bled en masse, means foi1 :rotating said cylindrical shell former? with oppositely ois groups in unison about said common axisI posed tunoated eonieal ends.y horizontellj,7 an anvil s fifa/e with which eaoh group of dispose not-stably mount., tnhulai snjpls (3o-acts9 means feeding inateial to sorting shan enten axially theiehe crushed to said groupe midway of their 40 tniongln said shalt pi'o f' cl with enel :nateopenative length Within the operative sphere i ial inlet ,and Within said sh ll with a plnnil of anvil and an annular series of pockets i flleehaige feed euwonnding said groups of crushing rods n seiies of giadnated material opezfiings5 a p nfality of gnoul s of crushing' :icljaoent theiiopposite enfls and rotatable soils disposed iaiallel with the shaft :unl thelevvith 'foi' receiving a portion of the 45 20 freely inovahl units Within said snell and crushed material 'for elevating the same and rotatable as units alo nt thefaxis of otaton clenositing it onto said rods. of saifl sha; end mites closing the opposite ln testimony Where-oi2 We have sigi'ied our ends of said shell7 and against which the names to this specification. rod ends ahnt, said plates piovicled with inatei'ial Clisohaige openings, a crushing anvil WREDERCK J. BEHl\lEMAN suiounfhng said shaft at the goint of said HAROLD S. REVTORTHY. 

